A machine costs $200,000, and is being depreciated straight-line over 10 years, with zero salvage value expected at the end of its useful life. The incremental cash flows resulting from the machine operations are expected to be $800,000 in annual revenue and $500,000 in annual expenses.

Assume 20% tax rate. What is the incremental after-tax net cash flow from the machine in year 4 of the project?